All

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 C02 Virus Diseases D014777 +
  C02.256 DNA Virus Infections D004266 +
   C02.256.430 Hepadnaviridae Infections D018347 +
    C02.256.430.400 Hepatitis B D006509 +
      C02.256.430.400.100 Hepatitis B, Chronic D019694 
 C02 Virus Diseases D014777 +
  C02.440 Hepatitis, Viral, Human D006525 +
   C02.440.435 Hepatitis B D006509 +
     C02.440.435.100 Hepatitis B, Chronic D019694 
 C06 Digestive System Diseases D004066 +
  C06.552 Liver Diseases D008107 +
   C06.552.380 Hepatitis D006505 +
    C06.552.380.705 Hepatitis, Viral, Human D006525 +
     C06.552.380.705.437 Hepatitis B D006509 +
       C06.552.380.705.437.100 Hepatitis B, Chronic D019694